Drawer sanding machine



Sept. 27. 1955 J. M. LANCASTER `DRWER SAND-[NG MACHINE 2 Sheets-Sheet l J ./Z Lancaster' INVENTOR L-.. LWL...

Filed July 5, 1953 la 1.44. -r

ATTORNEYS INVENTOR ATTORNEYS.

2 Sheets-Sheet 2 J J7. lancas Z'er- Sept. 27, 1955 J. M. LANCASTER DRAWER SANDING MACHINE Filed July 3, 1953 United States Patent "O This invention relates to "a sanding machine, and more particularly to a drawer, sanding machine providedwith means wherebythe entire sidesurface of the drawer as wellzas4 the lip thereofmay be simultaneously sanded;

A furthertobject of the inventionis. the provision ofr a device of. this character whichwill operate to sand 4thelip of the drawer with, a. minimum,- of effort and. di-fculty, and a consequent lack of possibility of splitting or breaking the latter.

A further object of the invention is the provision of a device of this character provided with means whereby ready adjustment as to the thickness of the lip to be sanded may be achieved.

A further very important object of the invention is the provision of such a device provided with a glass insert adjacent the edge of the lip of the drawer, for the purpose of reducing friction on the sanding belt, and the consequent necessity for frequent replacement thereof.

Still another object of the invention is the provision of a device of this character provided with a glass beaded table cover to reduce friction of the sanding belt on the table top.

Still other objects reside in the combinations of elements, arrangements of parts, and features of construction, all as will be more fully pointed out hereinafter and disclosed in the accompanying drawings wherein there is shown a preferred embodiment of this inventive concept.

In the drawings:

Figure l is a top plan view of the drawer sanding machine, certain concealed parts thereof being indicated in dotted lines, and the sanding belt being broken away to show other features of the invention.

Fig. 2 is a side view of the device of Fig. l, certain concealed parts being shown in dotted lines.

Fig. 3 is an end view of the device as disclosed in Fig. 2 viewed from the right-hand side thereof.

Fig. 4 is a fragmentary top sectional view of that portion of the sanding table which protrudes over the front end of the machine, disclosing in particular the mounting of the glass insert.

Fig. 5 is a sectional view taken substantially along the line 5--5 of Fig. 4.

Fig. 6 is a fragmentary side elevational View of a portion of the sanding bed and Fig. 7 is a fragmentary sectional view of the front portion of the device showing a drawer in place for sanding thereon.

Similar reference characters refer to similar parts throughout the several views of the drawing.

Having reference now to the drawings in detail there is generally indicated at 10 a chassis or main frame for the device which is mounted on suitable supporting legs 11. Frame 10 carries a table support 12 which serves to carry the sanding table per se, the latter being generally indicated at 13. Frame 10 carries adjacent its rear end a pair of spaced plates carrying journals 16, which in turn carry a fixed pulley or roller 17 over which is adapted to extend a portion of the sanding belt 18. Belt 18 extends 2,718,734 Patented Sept. 27, 1:1955V forwardly beneath the machine tolan adjustable rollery 1'9 l (see Fig. l), and thence upwardly acrossthe top of 'sanding table 13 to form an endless path. The manner `of mounting of the belt on the top of 'the table wilLbe Amore fully discussed hereinafter.

The belt is adapted to be driven byfmeans of anelectr'ic motor 20 suitably mounted ontransverse cross b'races21 carried by the frame, whichl drives through a series of endless V belts 22 the fixedpulley 17, the frictional engagementV of vthe latter with the sanding belt 18bei'nfg sucient to rotate the same at a desired rate of speed.

Suitable means are provided for supportingftheuadjus'table pulley 19, andtak'e the form o f racks 2,5fafrj1d 26 in upper and lowerA positions respectively between uwhich are mounted slidable grooved or4 channeled plates27 latter carry journals 28 which inturnlcarry 'the roller 19. Suitable side-sections or plates 29fare engaged by threaded ends 30 of members 31provided with knurled heads and which engage lspaced threaded brackets 32 Vand 3;rfre's`pectively. This device is employed for locking .the table in suitableadjus'ted position. By movingthe tableback and forth the angle at whichthe belt willft'ravelover theedge ofthe machine may be determined iii such manner as to allow the belt to travel over this edge of the machine and generate as little heat as possible'.

A further adjustment for roller 19 is provided by means of a threaded rod 40 upon one end of which is mounted an operating wheel 41, the entire assembly being supported in a suitable journal 42 carried by a transverse portion of the frame 43, and connected at its rear end to the support 44 for motor 20.

The front end of the sanding machine is provided with extending arms, as best shown in Fig. 4 generally indicated at 50, to which are secured as by means of screws 51 clamping brackets 52. These brackets extend forwardly and exteriorly of the machine and are connected as by means of bolts 53 to laterally extending plates 54, which in turn are secured to the main frame 10 of the machine as by means of screws 55. The outer edges 56 of plates 54 serve to engage, as best shown in Fig. 5, the upper portion of a glass plate 57 mounted at the extreme outer end of the device and over which the sanding belt passes.

Knurled releasing knobs 60 are provided for suitable adjustment of the plate as may be desired, the latter being carried on oppositely disposed supports 60', as best shown in Fig. 7. Knurled knobs 60 engage slidable rods or bars 61, which are in turn connected to a wooden clamping plate 62 (see Fig. 2) for the purpose of securely clamping the lip or flange of the drawer adjacent the sanding belt 18 in adjustable relation as may be desired.

Having reference now to Fig. 7 there is shown a fragmentary sectional view of the device employed in use in sanding a drawer wherein the belt 18 is disclosed as passing beneath the drawer side 65, and the lip 66 is held securely between glass plate 57 and wooden clamping means 62. It will be noted that the edge of glass plate 57 is undercut slightly as indicated at 67 to still further reduce friction.

Referring now back to Fig. 2 there is generally indicated at 70 a roller, operated by a hand wheel 71, which roller is adapted for the retention of a roll of glass beaded material comprising a table cover. This material extends over a guide roller 73 for the belt 18 positioned at the rear surface of the device and extends forwardly as indicated at 75 between the top of the table 12 and sanding roll 18, in order to further reduce the frictional engagement thereof. This glass beaded material covers the entire working surface of the table to materially reduce friction in the use of the sanding roll and its front end is adapted to be secured in fixed relation between the end of the working table 3 and glass insert 6. The material is adapted to be stretched tightly over the working surface by means of the roller 70.

From the foregoing it will now be seen that there is herein provided an improved sanding machine which operates with a minimum of friction and which may be readily adjusted in such manner as to simultaneously sand the side and lower lip of a drawer or the like, the glass insert at the forward end thereof providing minimal friction, while the glass beaded cover further reduces wear and tear on the sanding belt.

It will further be seen that by virtue of this device an improved sanding operation may be effected, that the life of the sanding belt may be materially prolonged, and thatrdamage to the drawer or the like is substantially obviated.

It should be noted that preferably an annular shield 78 is provided adjacent the sanding or forward edge of the device, for the purpose of reducing the residual dust normally incident to the operation.

From the foregoing it will further be seen that there is herein provided an improved sanding device which accomplishes all of the objects of this invention, and others, including many advantages of great practical utility and commercial importance.

As many embodiments may be made of this inventive concept, and as many modifications may be made in the Cil 4 embodiment hereinbefore set forth and described, it is to be understood that all matter herein is to be'interpreted merely as illustrative and not in a limiting sense.

I claim:

In a sanding machine for simultaneously sanding the side and lip of drawers, the combination of a frame, a table, an endless sanding belt operating thereover, means for locating the drawer lip adjacent the Working end of said sanding machine, a glass insert adjacent said locating means, said glass insert having an undercut outer lip, pulleys carrying said belt, means for moving one of said pulleys to vary the tension of said belt, a glass beaded fabric between said sanding belt and said table, a4 roller carrying said fabric mounted on said frame, and means for rotating said roller to renew the fabric.

References Cited in the le of this patent UNITED STATES PATENTS 

